Hone or grinder



Nov. 19, 1929. v. J. EMERY HONE OR GRINDER Filed Nov. 24. 1925 2 Sheets-Sheet 1 1929- v. J. EMERY v 1,736314 HONE OR GRINDER I Filed Nov. 24. 1925 2 Sheets-Sheet 2 I JO.

Patented Nov. 19, 1929 PAT NT:

- vroToR J. EMERY, or ALHAMBRA, o LIronNrA HONE B GRINDER Application filed Novemher 24; 1925. Serial No. 71,121.

spaced honing or grinding elements are carriedby a supporting structure, these elements are moved outwardly to the proper diameter to fit a particular cylinder and are under a spring tension tending to force said honing elements outwardly.

Another object of my invention is to transmit the driving or rotating force in the hones at substantially their mid length inorder to prevent the honing device from enlarging the mouth of the cylinder but causing it to maintain' the walls absolutely parallel andthere- 29 fore remain a true cylinder.

.A further object of my invention is to provide a honing device for cylinders with a cage or micrometer adjustment so that when the hone is introduced into thecylinder with the honing elements bearing thereagainst, the micrometer 'Screwmay'be adjusted to allow grinding or honmg to a certain definite larger diameter.

In my lnvention I utilize a hollow central stem having a universal joint in the central position of the hone and having the driving spindle operating through the universal joint. A plurality of fingers are rigidly mounted on the stem. A cageisurrounds the stem having an upper and a lower end and with the grinding elements mounted in longitudinally extending boxes, these boxes being positioned between the cap and base ends-of cage and the stem, being normally tensioned to rotate the fingers and cage relative to each other so that the fingers engaging pivoted the cage. A spring is coiled on the lower portion of the stem and engages the base of the after the collar hasbeen set against the stop the-micrometer screw may be operated to 'sllghtly displace the collar when it may beclamped and A the micrometer screw then threaded back allowingthe honing elements to grind to the increased diameter for which the sleeve has been set; i

' Myinvention willbe more readily understood; from the following description and drawings, in which; t

Figure l is'a vertical elevation of my hone indicated as inserted in a cylinder.

Fig. 2 is a planview of the hone in the direction of the arrow 2 of Fig. 1.

Fig. 3 is a base view of the" hone taken in the direction of the arrow 3 ofFig. 1.

Fig. 4 is a side elevation of the hone removed from thecylinder and-collapsed by pressure'o'n' the honing elements. I

Fig.5 is a plan taken in the direction of the arrow 5 of Fig. 4c. r Fig. 6 is a vertical. section indicating the hone expanded. i

Fig. 7 is-atransverse section on the" line 7'-7 of'Fig- 1, takenin the direction of the arrows.

8 isabase. view oi the hone in the direct on of the'arrow f Fig.4.

Flg. 9 isa transverse sect-ion of the hone on the line 99 of Fig. 4, or the line 9..9 of p F1g. 1, with the honingelements collapsed.

A cageforsupportingthe honing elements A is indicated by the 'numeral l and has a plu-,- I rality of side longitudinal bars 2'supporting amp 3 at the top and abase-i at the bottom.

The cap is circular. as shown in Figs. 2 and-5," 1

'whereas thebase has rightangular cut out sections: 5 to accommodate the base of the 'grlnding arms and the grinders, This cage have boxes 9 secured at their outer edge, such and grinding elements 10 are .inserted -inthe boxes. with the honing preparations for'honing or.

These grinding elements are coated boxes extendinglongitudinallyof the arms I A pin 20 is utilized to fasten thesleeve 13.

and thus'the fingers rigidly 'to the stem to be actuated thereby. A coil spring 21 is wound on the sleeve and has one-end22 engaging the base 4 an upper end 23 engaging the "hub 12 of the fingersr This spring is tensioned to normally rotate the fingers -in a clockwise direction; l

The fingers are provided wlth'a-cam surface 24 to engage withfl'at machined surfaces 25 on the back'of the arms. These machined surfaces on the arms are formed on inwardly extending ribs 26, thus the normal tendency of the spring is to rotate the stem andcam fingers relative to the -cage i and the surface of the fingers-bearing against the plane or machined surfaces ofthe ribs 26 to forcethe arms outwardly and thus the grinding elements tightly against the cylinder. i

It will'be noted that the armshave a slight cut out portion 27 as shown in;Fig.- 9 t-oallow thepoints-28ofthe fingers to fit therein when the hone is collapsed by being pressed inwardly. I j j The driving arrangement for my hone is V indicatedparticularly in Figs. 1, 4 and 6. A

drivingspindle 29 extends downwardly into the hollow portion of the stem 15 and by 3 means of a universal joint 30 is securedto the stem as close to the expanding finge'rsas possible, in order to haveacenter drive.

' For purposes of'illust-ration the-universal joint is shown positionedslightly above the inner end 31 of the hollow .stem, but this would be placed slightly lower in orderthat the driving force would besubstantiallyemid position between the upper "and lower ends 1 joint is indicated as havingswivelspins v32 7 3 connected to the stem and'engaginga col- "lar- 33, and a pin '34 passes transver'sely "through the spindle and through" the collar this being a simple form'o'f universal joint.

My gauging device-"for indicating the amount of i grinding s constructed substan- 'tially as follows, being. illustrated particularly in Figs. 1. 2, land 5.

A splitjcollar 35 is mounted jonftlije upper V 7 portion of the stem 15 above the'cap 3 and has a pair of lugs "36 with 'a'screwbolt 37 extending therethrough to clamp the split collar'firmly to the stem. A stop lug 38ex- The universal tends upwardly from the cap, being secured thereto in any suitable manner or, formed integral with the cap. A gauge lug 39 is formed integral with the split collar, preferably opposite the lugs 36. A micrometer screw 40 operates through the gauge lug 39.

It will be "noted that the arms and the grinding elements supportedther'eby are com 'pletely below the cap 3, asclearly shownin Figs. 1, 1 and (Sand also that these arms extend to the lower end of the base as shown in the same figures. The 'cut out sections 5 of the base allowthe arms to extend downfwardlyinto the plane of the base as shown in Figs. 3 and 8.

may beconnected to any suitable type of driving "shaft, these being usually flexible shafts. hen the hone is inserted in a cylinderyfor instance as shown in-Figs. 1 and 2, the spring forces the cam fingers 11 to rotate in a clockwise direction and hence forces the "fingers'with the grinding elements supported thereby firmly against the cylinder walls and to properly center the hone.

The -bolt37 of the split collar is loosened so that the collar may be positioned with the gauge lug in contact with the stop 38- on the cap. The micrometer screw 40 is then adjusted by screwing it into the gauge lug- 39, the requisite distance to separate the gauge lug from the stop The bolt 37 is then screwed tight clamping the split collar rigidly to the stem 15. The micrometer screw 40 is then retracted so that the-gauge lug and stop lug may contact in'the process of grinding as hereunder described,

It will be understood that'the micrometer screw-mayb'egraduated sothat an operator maybe able to ascertain by'the number of degrees through which it is turned and the number of completeturns, how many thou- I sandths of aninch the hone is set for grinding larger than the cylinder in'whichit has been adjusted. I

Thegrinding operation is carried on in tate' d and atthes'a'mje time the hone being moved longitudinally in the cylinder, thus uniformly honing and-grindingthe cylinder from top'.to "bottom and giving a'resultant Asthe spring forces. the fingers-to rotate relative tothe cage and thus forces the arms outwardly, "the grind cylindrical cylinder.

ing ojr'honin'g will continue until the gauge the 'usual manner by the spindle being rolug 39 comes into contact with the fixed'stop j V honingaction.

It will'thu's be seenthat with my honethe driving force is. substantially. mid position in 1 lug, thus limiting any further grinding or r'egardto the length ofthe 'honingeleinents and thereby eliminates the danger ofthecylinders bein formed bell mouthand that a positive gauge is provided which will allow grinding until the desired new diameter is reached and form an absolute limit to the grinding so that a cylinder cannot be overground.

It will be obvious that my hone or grinder may be considerably changed in general tea-- tending grinding elements, said elements be ing movable inwardly and outwardly, a driving spindle operatively connected to said cage by a universal joint, said joint being wholly connected at substantially the mid length of the cage.

2. A cylinder grinder comprising incombination a cage having a plurality of arms pivotally mounted to swivel outwardly of the cage, the axes of the swivelling arms being parallel to the axis of the cage, a driv-' ing spindle having a universal joint, and means operatively connecting the universal joint to the cage, the complete universal joint beng positioned substantially the mid length 01": the cage.

3. A cylinder grinder comprising in combination a cage having a cap and a base, a plurality of longitudinal side bars connecting the cap and the base, a plurality of arms pivotally mounted in the cap and the base, the pivotal connection being inside the said bars, grinding elements supported by the arms, a stem extending centrally through the cap and the centerof the cage and being secured to the base to allow relative rotation of the cage and the stem, a plurality of cam fingers rigidly connected to the stem having cams thereon at substantially the mid position of the cage, the said arms having surfaces at their mid-position axially of the cage to be engaged by the said cams, a coil spring wound over part of the stem and connected to the base, and operatively connected to the fingers, adapted to normally rotate the fingers relative to the cage to cause the outward swinging of the said arms, and means to rotate the stem.

4. A cylinder grinder as claimed in claim 3 in which the stem ishollow at its upper end, having a driving spindle extending therein and with a universal joint at the lower end of the spindle said joint being connected to the stem at substantially the mid position of the cage.

5. Ina cylinder grinder, a cage having a plurality of grinding elements movable outwardly from the cage for grinding operations, a stem fitting inthe cage and oper prising elements mounted respectively on "separate the gauge and stop lu-gsa predeing a gauge'lug mounted on the stem, a miative -means betweenthestem' and-the grind- I ring elements" to allow outward movementof the grinding elements on-partial rotation of thefstem relativeto the cage, a gauge comthe', stem and the cage, adapted to allow'setting of thestem and the cage whereby a predetermined relative rotation maybe had and a predetermined movement of the grind ingJelementsmay be obtained, the said cage being providedwith a stop lug-and the stem with an adjustable collar having a gauge lug to contact with the said stop lug, a micrometer screw fitted inthe gauge lug to termined amount by engaging the-stop lug,

and means to clamp-the collar to the stem.

6. In a cylinder grinderhaving a struce ture with a plurality of expandible grinding elements mounted therein, a central stem having a,driving means for'rotating the said structure, thestem and the structure baving'a relative rotaryinovement, a stop lug mounted on the structure, a collar; havcrometer screw in the gauge lug toseparate the said lug and the stop lug a predetermined amount by' contacting with the stop lug and meansto'clamp; the collar to the stem. q

7 A hone or' grinder comprising in combination a stem having ahollow upper'portion, a reduced lower portion with a sleeve on-the reducedlower portion and a hub on theupper end of-the sleeve below the hollow portion of the stem, a cage, means mounting same on the upper and lower portions of the stem, arms pivotally connected to the upper and'lower port-ions of thecage and having grinding elements extending longitudinaly ofthe'cage, cam fingers connected to the hub, interengaging means "between the cam fingers and the arms, a dIlVlIlg-SPlIldle extending into the hollow portion of the stem and being connected-tosame by a universal joint, said joint being positioned sub stantially at the length of the cage, and a spring surrounding-the sleeve interconnected between the hub and the" lower portion of the cage. I

8. A cylinder grinder comprising in combination a cage having longitudinally extending grinding elements, a stem mounted in the cage, the upper portion of said stem being hollow, a' spindle extending into the connected to same by auniversal joint, said bination a cage having a plurality of arms pivotally mounted to swing outwardly of the cage, the axes of the swinging arms being parallel to the axis of the cage, a stem mounted in the cage, the upper part of said hollow upper portion of the stem and being I 4- i "s ans stem beingvrhollow a driving spindle extend: ing intothehollowportion of the stern and I being connected thereto :bya universal joint, I p the'saidjoint being "completely positioned 1 substantially the'mid-lengthof the cage. i 10.;A cylindergr-indercomprisingincomv bination a cage having longtiudinallyfextending grinding elements, alstemimounted in the cage, the upper portionof saidistem am being hollow, swivel pins connected to opposite sides of the hollow stem, acollar mounted on said swivel pins, aspindleextending into the hollow portion of thestem-and into the collar and being pivotally 'eonnec'ted to ,1 the collar-bya pin, the said -swivelpinsflhe collar and the pin formingzauniyersaljoint, v substantially on the same horizontal plane, and being connected to the hollow party of the stem substantially the :mid length of the Ego cage.

11. A cylinder grinder comprising in com 'bination a cage having a plurality of arms piyotally connected thereto, said arms -be ing pivoted. to the top and bottom of the h g5 cage and adapted toextend outwardly from the cage, a-stem centrally positioned within the cage, the upper ,portion of saidfstem being hollow, a driving spindle extending-into the stem, being-connected thereto bya uniao versal joint, said joint being at substantially the mid-position'ofthecage, aplurality of a cam fingershaving means rigidly connecting same to the stem at substantiallythe mid- =position of the cage, said fingers-engaging 95 the arms at: substantially the mid-length of the arms considered longitudinally of the cage, a spring normally tensioned to turn-the stein relative toxthe'cage and to mov.e said :fingers into engagement with the arms, -.a

p40 collar adjustably mounted on ithe -stem above Qthecam, theca'p having a stop lug and the collarrhaving a gauge lug,=a micrometer.screw extending through the gauge lug and being adapted to engage-the stop lug,'and means q to clamp the collar to the stem.

*In' testimony whereof I have signed 'm-y name'to this specification. 1 I I 'VICTOR-JLEMERY. .1 

